【Spring八】Spring与Hibernate整合

Hibernate所需元素：

三要素:实体类，*.hbm.xml,hibernate.cfg.xml

Spring所需元素：

applicationContext.xml

hibernate在操作数据库时，使用sessionFactory.openSession()来增删改查，并通过session来开启事务。

与spring整合时，事务的管理交给了spring，利用面向切面的思想来操作事务。

在spring的配置文件中引入sessionFactory,由于没法直接将sessionFactory注入，因为没有提供构造方法和set方法，获取回忆hibernate操作时，获取sessionFactory通过的是从hibernate.cfg.xml配置文件获取：

SessionFactory   sessionFactory   = configuration.buildSessionFactory();

那么在Spring的配置文件中，该如何注入SessionFactory呢？

通过一个中间类：LocalSessionFactoryBean

详细代码：

1.关于hibernate相关的配置文件：

hibernate操作的实体类为Classes班级实体类：

①Classes.hbm.xml<->Classes.java

②hibernate.cfg.xml

2.Spring配置文件：

applicationContext.xml:

< beans  xmlns="http://www.springframework.org/schema/beans"        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"        xmlns:aop="http://www.springframework.org/schema/aop"        xmlns:tx= "http://www.springframework.org/schema/tx"        xsi:schemaLocation="           http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd           http://www.springframework.org/schema/aop           http://www.springframework.org/schema/aop/spring-aop-2.5.xsd           http://www.springframework.org/schema/tx           http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"  >                         < bean  id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >             <property name= "configLocation">                 <value> classpath:hibernate.cfg.xmlvalue >             property>       bean  >                   < bean             class= "org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >             <property name= "locations">                 <value> classpath:jdbc.propertiesvalue >             property>       bean  >       < bean  id="dataSource" destroy-method="close"             class= "org.apache.commons.dbcp.BasicDataSource" >             <property name= "driverClassName" value="${jdbc.driverClassName}" />             <property name= "url" value ="${jdbc.url}" />             <property name= "username" value="${jdbc.username}" />             <property name= "password" value="${jdbc.password}" />       bean  >             < bean  id="sessionFactory1" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" >             <property name= "dataSource" ref ="dataSource"/>           <property name= "mappingResources">             <list>               <value> cn/itheima03/spring/ hibernate/transaction/domain/Classes.hbm.xml value>             list>           property>           <property name= "hibernateProperties">             <value>              hibernate.dialect=org.hibernate.dialect.MySQLDialect             value>           property>       bean  >                               < bean  id="classesDao" class="cn.itheima03.spring.hibernate.transaction.dao.impl.ClassesDaoImpl" >             <property name= "sessionFactory">                 <ref bean= "sessionFactory1"/>             property>       bean  >             < bean  id="classesService" class="cn.itheima03.spring.hibernate.transaction.service.impl.ClassesServiceImpl" >             <property name= "classesDao">                 <ref bean= "classesDao"/>             property>       bean  >                   < bean  id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager" >             <property name= "sessionFactory">                 <ref bean= "sessionFactory1"/>             property>                  bean  >                   < tx:advice  id="tx" transaction-manager="transactionManager" >             <tx:attributes>                 <tx:method name= "save*" read-only ="false"/>             tx:attributes>       tx:advice  >             < aop:config  >             <aop:pointcut expression="execution(* cn.itheima03.spring.hibernate.transaction.service.impl.ClassesServiceImpl.*(..))" id ="perform"/>             <aop:advisor advice-ref="tx" pointcut-ref= "perform"/>       aop:config  > beans >

其他代码：

//继承 HibernateDaoSupport public  class ClassesDaoImpl extends HibernateDaoSupport implements ClassesDao{       @Override       public  void saveClasses(Classes classes) {             this.getHibernateTemplate().save(classes);      } } ==================================== public  class ClassesServiceImpl implements ClassesService{       private  ClassesDao classesDao;       public  ClassesDao getClassesDao() {             return classesDao ;      }       public  void setClassesDao(ClassesDao classesDao) {             this.classesDao = classesDao;      }       public  void saveClasses(Classes classes){             this.classesDao .saveClasses(classes);      } } ==================================== public  class ClassesServiceTest {       @Test       public  void testSaveClasses(){           ApplicationContext context =  new ClassPathXmlApplicationContext("cn/itheima03/spring/hibernate/transaction/config/applicationContext.xml" );           ClassesService classesService = (ClassesService) context.getBean( "classesService"  );           Classes classes =  new Classes();           classes.setCname(  "aa");           classesService.saveClasses(classes);      } }